766663742 has 16 divisors (see below), whose sum is σ = 1244019840. Its totient is φ = 352255392.

The previous prime is 766663741. The next prime is 766663769. The reversal of 766663742 is 247366667.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766663741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60317 + ... + 71912.

It is an arithmetic number, because the mean of its divisors is an integer number (77751240).

Almost surely, 2^766663742 is an apocalyptic number.

766663742 is a deficient number, since it is larger than the sum of its proper divisors (477356098).

766663742 is a wasteful number, since it uses less digits than its factorization.

766663742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132467.

The product of its digits is 1524096, while the sum is 47.

The square root of 766663742 is about 27688.6933964028. The cubic root of 766663742 is about 915.2399629423.

It can be divided in two parts, 76666 and 3742, that added together give a palindrome (80408).

The spelling of 766663742 in words is "seven hundred sixty-six million, six hundred sixty-three thousand, seven hundred forty-two".